<!DOCTYPE html>
<html>
    <head>
	<meta charset="utf-8" />
		<title></title>
<!--[if lt IE 9]><!-->
    		<script src="http://code.jquery.com/jquery-1.11.3.min.js "></script>
<!--<![endif]-->
<!--[if gte IE 9]><!-->
			<script src="https://code.jquery.com/jquery-3.2.1.min.js "></script>
<!--<![endif]-->
	<script>
	$(document).ready(function(){
	$("button").click(function(){
		$("img").attr("width","500");
	});
});
</script>
</head>
<body>

<img src="img_pulpitrock.jpg" alt="Pulpit Rock" width="284" height="213">
<br>
<button>为图片设置width属性</button>

</body>
</html>
